Bike indicators for Micro:bit

microbit.js

input.onButtonPressed(Button.A, () => {
    radio.sendNumber(0)
    for (let i = 0; i < 10; i++) {
        basic.showLeds(`
            . . # . .
            . # . . .
            # # # # #
            . # . . .
            . . # . .
            `)
        basic.clearScreen()
        basic.pause(100)
    }
})
input.onButtonPressed(Button.B, () => {
    radio.sendNumber(1)
    for (let i = 0; i < 10; i++) {
        basic.showLeds(`
            . . # . .
            . . . # .
            # # # # #
            . . . # .
            . . # . .
            `)
        basic.clearScreen()
        basic.pause(100)
    }
})
let direction = 0
radio.onDataPacketReceived(({receivedNumber}) => {
    direction = receivedNumber
    if (direction == 1) {
        basic.clearScreen()
        for (let i = 0; i < 10; i++) {
            basic.showLeds(`
                . . # . .
                . . . # .
                # # # # #
                . . . # .
                . . # . .
                `)
            basic.clearScreen()
            basic.pause(100)
        }
    }
    if (direction == 0) {
        basic.clearScreen()
        for (let i = 0; i < 10; i++) {
            basic.showLeds(`
                . . # . .
                . # . . .
                # # # # #
                . # . . .
                . . # . .
                `)
            basic.clearScreen()
            basic.pause(100)
        }
    }
})

Utilises two micro bits with the same code as above. Each bit tells each other which arrow to display when you push the corresponding button.